CN103522016B - The processing method of semi-autogenous mill middle cylinder body liner plate - Google Patents
The processing method of semi-autogenous mill middle cylinder body liner plate Download PDFInfo
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- CN103522016B CN103522016B CN201310485685.9A CN201310485685A CN103522016B CN 103522016 B CN103522016 B CN 103522016B CN 201310485685 A CN201310485685 A CN 201310485685A CN 103522016 B CN103522016 B CN 103522016B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/22—Lining for containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Food Science & Technology (AREA)
- Heat Treatment Of Articles (AREA)
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Abstract
The invention discloses the processing method of semi-autogenous mill middle cylinder body liner plate.Lifting strip is arranged on the central authorities of shell liner, and lifting strip top is set to right angle, and lifting strip bottom is set to obtuse angle, and symmetrically on lifting strip both sides is uniformly provided with reinforcement and hole for hoist.Product adopts superhigh manganese alloy steel; Its each element of filling a prescription is by weight percentage, carbon: 1.0 ~ 1.4, manganese: 17 ~ 19, phosphorus: & lt; 0.05, silicon: 0.3 ~ 1.0, sulphur: & lt; 0.05, aluminium: & lt; 0.2, vanadium: & lt; 0.5, chromium: 1.5 ~ 2.5, nickel :≤1.5, copper :≤0.5, molybdenum: 0.3-1.0, rhenium: trace, all the other are iron.The present invention is by changing material prescription, and design shell liner structure, optimizes Technology for Heating Processing, improve bulk strength and the hardness of shell liner, meet the mechanical performance of equipment.Reduce labour intensity, extend the service life of equipment, at least more than six months, improve economic benefit.
Description
Technical field
The present invention relates to semi-autogenous mill, particularly relate to a kind of processing method of semi-autogenous mill middle cylinder body liner plate.
Background technology
Semi-autogenous mill mainly pulverizes milling apparatus in the industry production such as domestic and international thermoelectricity, mine, chemical industry, metallurgy, and shell liner and abrading-ball are then the main working parts during semi-autogenous mill runs well.Its operation principle: ore is with barrel body rotation, and position is improved rapidly, transfers tension state to very soon from pressured state.When ore gravity overcomes centrifugal force, ore just departs from cylindrical shell and falls, but the path that various granularity ore falls is different.Lump ore due to gravity large, upper body to during lower height first landing get off, impact and milling action are produced to comparatively granule simultaneously, move toward body centre layer subsequently; The ore of intermediate block is rolled down by rushing down state after arriving higher position with cylindrical shell, and ore phase attrition stripping formation is rushed down and settled in an area; Fritter ore reaches more high position with cylindrical shell and falls along parabolic path, forms ore waterfall and settles in an area.Impulsive force now makes ore be milled to particulate, and the particle conforming with product granularity requirement is discharged from middle part by discharge end diagrid.
Existing semi-autogenous mill mainly has problems:
1. domestic semi-autogenous mill shell liner generally adopts chrome molybdenum, and can not meet on-the-spot time instructions for use, service life was at about 3 months.
2. in the middle part of shell liner, lifting strip position is weak, and insufficient strength, easily makes shell liner lose efficacy.
As: Jinchuan Group Co., Ltd.'s 1,100,000 tons/year of Cu-S ore ore dressing projects, in the trial production stage, find that 5800 × 5800mm semi-autogenous mill shell liner and liner plate lifting strip position and discharge end liner plate have cracked phenomenon.Cause the liner plate of grinding machine inadequate for service life, affect the normal operation of equipment.
From on-the-spot on-the-spot investigation situation, the cracked phenomenon of liner plate mainly occurs in lifting strip position on four corners of liner plate and liner plate and stress concentration portion position.
What current Jinchuan Group ore dressing plant semi-autogenous mill was selected is chrome molybdenum liner plate, and its service life was lower than four months.
Tradition shell liner installation form and the displacement analysis of causes:
Tradition shell liner amounts to 160 pieces, long 1410mm, wide about 440mm, and the monolateral protruding 80mm of shell liner is lifting strip, has two bolts hole, pitch-row 870mm in the middle of shell liner, and shell liner leans on the gib-headed bolt of two M58 to be fixed on cylindrical shell.
Facts have proved that shell liner has in length and width bending, and lifting strip part wears is serious, down grinding machine tire cornering wear is ramp-like.Its reason one is that shell liner is longer yielding; Two is that lifting strip is higher, makes steel ball impulsive force too strong, causes shell liner stress deformation.
Along with the development of modern production, semi-autogenous mill demand gets more and more, and the diameter of semi-autogenous mill is also increasing, and the semi-autogenous mill that diameter is about five meters is extensive use aborning, therefore more and more higher to the quality requirement of shell liner and abrading-ball.Because shell liner and abrading-ball are in harsh operating mode for a long time, maintenance capacity and replacing amount are all quite large, not only waste of manpower, material resources, financial resources, and directly affect production efficiency, affect carrying out production strictly in line with rules and regulations of modern enterprise.Therefore, selecting the shell liner of New Kind of Anti-Abrasion, shock resistance material, create semi-autogenous mill internal structure, is the important channel of improving output, reducing consumption, striving for good economy and civilized environment.
Summary of the invention
Object of the present invention is exactly the processing method that will provide a kind of semi-autogenous mill middle cylinder body liner plate, and it can overcome the above defect that existing equipment exists.The object of the present invention is achieved like this, the processing method of semi-autogenous mill middle cylinder body liner plate, comprise lifting strip bottom, lifting strip, lifting strip top, lifting strip is arranged on the central authorities of shell liner, lifting strip top is set to right angle, is convenient to promote steel ball, and lifting strip bottom is set to obtuse angle, and symmetrically on lifting strip top, lifting strip bottom be uniformly provided with reinforcement, reinforcement gusset is provided with hole for hoist; It is characterized in that: described shell liner adopts superhigh manganese alloy steel; Its each element of filling a prescription is by weight percentage, carbon: 1.0 ~ 1.4, manganese: 17 ~ 19, phosphorus: < 0.05, silicon: 0.3 ~ 1.0, sulphur: < 0.05, aluminium: < 0.2, vanadium: < 0.5, chromium: 1.5 ~ 2.5, nickel :≤1.5, copper :≤0.5, molybdenum: 0.3-1.0, rhenium: trace, all the other are iron.
The processing method of semi-autogenous mill middle cylinder body liner plate, is characterized in that: adopt sand casting, technological process is: according to design drawing determination product size → mould sample making → Mold Making → moulding → painting high-temperature coatings → join case → dimension control → mould assembling → according to formula batching → smelting temperature 1420 DEG C-1430 DEG C, stokehold Chemical bath deposition, whether composition adjustment → thermometric reaches smelting temperature → pouring temperature≤1500 DEG C, every block duration of pouring is 15 ~ 20 seconds → temperature retention time is 24 hours, unpacking → inspection of semifinished product below 200 DEG C, performance test confirmation → remove feeder → heat treatment → mechanical performance detects: → finished product is by figure inspection, inept product again melts down → packs, identify → enter storehouse.
Described Technology for Heating Processing is: be heated to 1100 DEG C, is incubated 4 hours, shrend, then through 250 DEG C of temper, is incubated 4 hours, and the type of cooling is cool with stove.
Described mechanical performance is detected as: tensile strength sigma
b>=400MPa; Yield strength σ
s>=510MPa; Percentage elongation δ>=14%; Section shrinkage ψ>=12%, hardness HB222 ~ 230.
The present invention, by changing the material prescription of shell liner, adopts ultra-high manganese steel, because ultra-high manganese steel has good toughness and work hardening capacity, improves the quenching degree of shell liner, anti-compacted property and wearability.Design shell liner structure, optimizes Technology for Heating Processing, improves bulk strength and the hardness of shell liner, meet the overall mechanical properties of equipment.Tensile strength sigma compared with traditional shell liner
bimprove 18.2%, yield strength σ
simprove 7%, impact value a
kimprove 22%, percentage elongation δ improves 30.3%, and hardness improves 9.7%.Decrease maintenance number of times, avoid the duplication of labour, reduce labour intensity, extend the service life of equipment, at least more than six months, improve economic benefit.
Accompanying drawing explanation
Fig. 1 is the perspective view of traditional shell liner;
Fig. 2 is the perspective view of shell liner of the present invention;
Fig. 3 is the front view in structural representation of the present invention;
Fig. 4 is the top view in structural representation of the present invention;
Fig. 5 is the upward view in structural representation of the present invention;
Fig. 6 is the left view in structural representation of the present invention;
1. lifting strip bottom, 2. lifting strip, 3. lifting strip top, 4. reinforcement, 5. hole for hoist, 6. shell liner.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described;
The processing method of semi-autogenous mill middle cylinder body liner plate, comprise lifting strip bottom 1, lifting strip 2, lifting strip top 3, lifting strip 2 is arranged on the central authorities of shell liner 6, and lifting strip top 3 is set to right angle, be convenient to promote steel ball, lifting strip bottom 1 is set to obtuse angle, and symmetrically on lifting strip top 3, lifting strip bottom 1 is uniformly provided with reinforcement 4, and reinforcement 4 gusset is provided with hole for hoist 5; It is characterized in that: described shell liner adopts superhigh manganese alloy steel; Its each element of filling a prescription is by weight percentage, carbon: 1.0 ~ 1.4, manganese: 17 ~ 19, phosphorus: < 0.05, silicon: 0.3 ~ 1.0, sulphur: < 0.05, aluminium: < 0.2, vanadium: < 0.5, chromium: 1.5 ~ 2.5, nickel :≤1.5, copper :≤0.5, molybdenum: 0.3 ~ 1.0, rhenium: trace, all the other are iron.
The processing method of semi-autogenous mill middle cylinder body liner plate, is characterized in that: adopt sand casting, technological process is: according to design drawing determination product size → mould sample making → Mold Making → moulding → painting high-temperature coatings → join case → dimension control → mould assembling → according to formula batching → smelting temperature 1420 DEG C-1430 DEG C, stokehold Chemical bath deposition, whether composition adjustment → thermometric reaches smelting temperature → pouring temperature≤1500 DEG C, every block duration of pouring is 15 ~ 20 seconds → temperature retention time is 24 hours, unpacking → inspection of semifinished product below 200 DEG C, performance test confirmation → remove feeder → heat treatment → mechanical performance detection → finished product is by figure inspection, inept product again melts down → packs, identify → enter storehouse.
Described Technology for Heating Processing is: be heated to 1100 DEG C, is incubated 4 hours, shrend, then through 250 DEG C of temper, is incubated 4 hours, and the type of cooling is cool with stove.
Described mechanical performance is detected as: tensile strength sigma
b>=400MPa; Yield strength σ
s>=510MPa; Percentage elongation δ>=14%; Section shrinkage ψ>=12%, hardness HB222 ~ 230.
During concrete enforcement, due to the fragmentation of semi-autogenous mill, shell liner must carry the impact of abrading-ball and material, and this just requires that the material of shell liner itself has enough toughness and impact resistance.
For weak parts such as strengthening lifting strips, improve the structure of shell liner, thus guarantee that the overall performance of foundry goods reaches requirement.
Lifting strip is arranged in the middle of shell liner, lifting strip two ends uniform force, and lifting strip cross section in echelon intensity is strengthened, and lifting strip bottom, lifting strip both sides, lifting strip top are provided with reinforcement, strengthens gusset is provided with hole for hoist, installs lifting conveniently.The height of shell liner is required, as long as change the height of lifting strip, all the other size constancies according to user.
After shell liner structure is improved, by improving the measure such as formula, employing New Technology of Heat Treatment of superhigh manganese alloy steel, the quenching degree of the wear-resisting superhigh manganese alloy steel of good solution, anti-compacted property and wearability problem, improve initial hardness and the overall mechanical properties of superhigh manganese alloy steel, the every technic index of semi-autogenous mill will increase, and with other parts grate on semi-autogenous mill, hold shell liner synchronously to wear and tear, together change, reduce maintenance number of times, avoid the duplication of labour, reduce costs, increase the benefit.
The product that the present invention produces meets relevant international standard ASM, ACI, AISI, SEB, JSSA/SC and domestic standard DL, GB, YB.
A, product material operative norm are Q/321282HZC01-2007;
B, steel and alloy chemical analysis method perform GB/T223;
The chemical analysis sample sampling method of c, steel and finished chemical composition tolerance perform by GB/T222 regulation;
D, metal pull test method perform GB/T228;
E, metal Charpy-type test method perform GB/T229;
F, metallic rockwell hardness test method perform GB/T230;
G, foundry goods, dimensional tolerance perform GB/T6414;
H, casting weight tolerance perform GB/T11351;
The microscopic structure method of inspection of i, steel performs GB/T13298;
The antioxygenic property assay method of j, steel performs GB/T13303;
K, steel-casting should meet JB/T5000.6-2007 " steel-casting general technical specifications ";
L, steel-casting repair welding should meet JB/T5000.7-2007 " steel-casting repair welding general technical specifications ";
M, rust prevention packaging should meet the pertinent regulations of GB4879-85;
N, application should meet JB/T5000.12-2007 " application general technical specifications "
O, heat treatment meet GB5615-85 " title of steel-casting condition of heat treatment, definition and code name ".
The technical requirement of shell liner is:
(1) shell liner and grate material use
super-high Manganese antifriction alloyzGMn17Cr2.Feed end shell liner and dustpan plate adopt high manganese ZGMn13Cr1;
Table 1 shell liner and grate main chemical compositions
Table 2 feed end shell liner and dustpan shell liner main chemical compositions
(2) shell liner thickness δ=70mm, shell liner thickness refers to that with cylindrical shell connecting portion thickness be 70mm, and the trapezoidal height overall in cross section is 218mm;
Or require to formulate according to user;
(3) shell liner hardness HRC48 ~ 52;
(4) each mating surface board foot is checked, the high point of cleaning polishing, impulse-free robustness, cicatricle;
(5) shell liner (6mm damper rubber is pasted at the back side) adopts high-strength bolt to connect with cylindrical shell is fixing;
(6) leave counterbore, counterbore impulse-free robustness when shell liner makes, counterbore size makes by drawing;
Shell liner casting technique is:
(1), sand casting is adopted.
(2), technological process is: product size chain confirmation → mould sample making → Mold Making → moulding → coating → join case → dimension control → mould assembling → batching → smelting, stokehold Chemical bath deposition, composition adjustment → thermometric → cast → insulation, unpacking → inspection of semifinished product, performance test confirmation → remove feeder (polishing), heat treatment → hardness determination → product inspection → packaging, identifies → enters storehouse.
table 3 checkout equipment
| Sequence number | Device name | Model and specification | Quantity | Pilot project |
| 1 | Vertical direct-reading spectrometer | SPECTROMAXx | 1 | Physical test |
| 2 | Punching tester | JB-30A | 1 | Punch test |
| 3 | Electronic Rockwell apparatus | HR-150DT | 1 | Hardness test |
| 4 | Leeb Hardness Tester | HLN-11A | 1 | Hardness test |
| 5 | Universal hydraulic testing machine | WE-600 | 1 | Physical and chemical inspection |
| 6 | Carbon and sulfur automatic analyzer | HCS-4B | 1 | Physico-chemical tests |
Claims (4)
1. the processing method of semi-autogenous mill middle cylinder body liner plate, comprise lifting strip bottom (1), lifting strip (2), lifting strip top (3), lifting strip (2) is arranged on the central authorities of shell liner (6), and lifting strip top (3) are set to right angle, be convenient to promote steel ball, lifting strip bottom (1) is set to obtuse angle, and above symmetrical in lifting strip top (3), lifting strip bottom (1) is uniformly provided with reinforcement (4), and reinforcement (4) gusset is provided with hole for hoist (5); It is characterized in that: described shell liner (6) adopts superhigh manganese alloy steel; Its each element of filling a prescription is by weight percentage, carbon: 1.0 ~ 1.4, manganese: 17 ~ 19, phosphorus: < 0.05, silicon: 0.3 ~ 1.0, sulphur: < 0.05, aluminium: < 0.2, vanadium: < 0.5, chromium: 1.5 ~ 2.5, nickel :≤1.5, copper :≤0.5, molybdenum: 0.3 ~ 1.0, rhenium: trace, all the other are iron.
2. the processing method of semi-autogenous mill middle cylinder body liner plate according to claim 1, is characterized in that: adopt sand casting, technological process is: according to design drawing determination product size → mould sample making → Mold Making → moulding → painting high-temperature coatings → join case → dimension control → mould assembling → according to formula batching → smelting temperature 1420 DEG C-1430 DEG C, stokehold Chemical bath deposition, whether composition adjustment → thermometric reaches smelting temperature → pouring temperature≤1500 DEG C, every block duration of pouring is 15 ~ 20 seconds → temperature retention time is 24 hours, unpacking → inspection of semifinished product below 200 DEG C, performance test confirmation → remove feeder → heat treatment → mechanical performance detection → finished product is by figure inspection, inept product again melts down → packs, identify → enter storehouse.
3. the processing method of semi-autogenous mill middle cylinder body liner plate according to claim 2, is characterized in that: described Technology for Heating Processing is: be heated to 1100 DEG C, is incubated 4 hours, shrend, then through 250 DEG C of temper, is incubated 4 hours, and the type of cooling is cool with stove.
4. the processing method of semi-autogenous mill middle cylinder body liner plate according to claim 2, is characterized in that: described mechanical performance detects data and is: tensile strength sigma
b>=400MPa; Yield strength σ
s>=510MPa; Percentage elongation δ>=14%; Section shrinkage ψ>=12%, hardness HB222 ~ 230.
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| CN104399565A (en) * | 2014-11-04 | 2015-03-11 | 洛阳矿山机械工程设计研究院有限责任公司 | High-low-high split type lining board for semi-autogenous mill barrel and operation method |
| CN105269307A (en) * | 2015-09-15 | 2016-01-27 | 辽宁科技大学 | Mounting and fixing method for liner plate of steel tapping rod of heating furnace |
| CN106141582B (en) * | 2016-07-14 | 2018-03-13 | 洛阳诚创耐磨材料有限公司 | A kind of preparation method of the grinding machine input and output material bushing of replaceable abrasion-proof lining body |
| CN109145383A (en) * | 2018-07-24 | 2019-01-04 | 铜陵有色金属集团股份有限公司 | A method of semi-autogenous mill pack completeness is calculated based on liner plate quantity |
| RU2753195C1 (en) * | 2020-02-12 | 2021-08-12 | Акционерное общество "Полюс Красноярск" | Lining of semi-autogenous grinding drum mills |
| CN114082843B (en) * | 2021-10-22 | 2023-12-26 | 宁波塞纳电热科技有限公司 | Rib mould is beaten to kettle body |
| GB2615821B (en) * | 2022-02-22 | 2024-06-26 | Weir Minerals Australia Ltd | Head lifter bar |
| CN114589460A (en) * | 2022-03-03 | 2022-06-07 | 中信重工机械股份有限公司 | Method for manufacturing composite inlaid lining plate |
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